#ifndef __HMAC_SHA1_H__
#define __HMAC_SHA1_H__

#include "SHA1.h"

typedef unsigned char BYTE ;

class CHMAC_SHA1 : public CSHA1
{
  private:
    BYTE m_ipad[64];
    BYTE m_opad[64];

    char * szReport ;
    char * SHA1_Key ;
    char * AppendBuf1 ;
    char * AppendBuf2 ;
  
  public:
    enum {
        SHA1_DIGEST_LENGTH	= 20,
        SHA1_BLOCK_SIZE		= 64,
        HMAC_BUF_LEN		= 4096
    } ;
    CHMAC_SHA1()
        :szReport(new char[HMAC_BUF_LEN]),
        AppendBuf1(new char[HMAC_BUF_LEN]),
        AppendBuf2(new char[HMAC_BUF_LEN]),
        SHA1_Key(new char[HMAC_BUF_LEN])
    {}

    ~CHMAC_SHA1()
    {
        delete[] szReport ;
        delete[] AppendBuf1 ;
        delete[] AppendBuf2 ;
        delete[] SHA1_Key ;
    }

    void HMAC_SHA1(BYTE *text, int text_len, BYTE *key, int key_len, BYTE *digest);
};


#endif /* __HMAC_SHA1_H__ */
